* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  background: #121418;
  color: #E8E6E1;
  font-family: 'Inter', sans-serif;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  padding: 48px 16px;
}

.container {
  width: 100%;
  max-width: 820px;
}

/* Header */
.header {
  text-align: center;
  margin-bottom: 40px;
}

.logo {
  font-family: 'Instrument Serif', serif;
  font-weight: 400;
  font-size: 36px;
  color: #A78BFA;
  letter-spacing: -0.5px;
}

.subtitle {
  color: #7A7D85;
  font-size: 14px;
  margin-top: 8px;
}

/* Form */
.reader-form {
  margin-bottom: 32px;
}

.input-group {
  display: flex;
  gap: 8px;
}

.url-input {
  flex: 1;
  padding: 12px 16px;
  background: #1A1D24;
  border: 1px solid #2A2D35;
  border-radius: 8px;
  color: #E8E6E1;
  font-family: 'Inter', sans-serif;
  font-size: 14px;
  outline: none;
  transition: border-color 0.2s;
}

.url-input::placeholder {
  color: #7A7D85;
}

.url-input:focus {
  border-color: #A78BFA;
}

.btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  background: #A78BFA;
  color: #121418;
  border: none;
  border-radius: 8px;
  font-family: 'Inter', sans-serif;
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
  transition: opacity 0.2s, transform 0.1s;
  min-width: 110px;
}

.btn:hover {
  opacity: 0.9;
}

.btn:active {
  transform: scale(0.97);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-spinner {
  display: none;
  width: 16px;
  height: 16px;
  border: 2px solid #121418;
  border-top-color: transparent;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

.btn.loading .btn-text {
  display: none;
}

.btn.loading .btn-spinner {
  display: block;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Result area */
.result-area {
  background: #1A1D24;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid #2A2D35;
}

.toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  background: #151820;
  border-bottom: 1px solid #2A2D35;
}

.tabs {
  display: flex;
  gap: 0;
}

.tab {
  background: none;
  border: none;
  color: #7A7D85;
  padding: 12px 16px;
  font-family: 'Inter', sans-serif;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: color 0.2s, border-color 0.2s;
}

.tab:hover {
  color: #E8E6E1;
}

.tab.active {
  color: #A78BFA;
  border-bottom-color: #A78BFA;
}

.btn-copy {
  background: none;
  border: 1px solid #2A2D35;
  color: #A78BFA;
  padding: 4px 12px;
  border-radius: 4px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s;
}

.btn-copy:hover {
  background: #2A2D35;
  border-color: #A78BFA;
}

/* Preview */
.preview {
  padding: 24px;
  line-height: 1.7;
  font-size: 15px;
  color: #E8E6E1;
  max-height: 600px;
  overflow-y: auto;
}

.preview h1, .preview h2, .preview h3, .preview h4 {
  font-family: 'Instrument Serif', serif;
  font-weight: 400;
  color: #E8E6E1;
  margin-top: 1.5em;
  margin-bottom: 0.5em;
}

.preview h1 { font-size: 28px; }
.preview h2 { font-size: 22px; }
.preview h3 { font-size: 18px; }

.preview p {
  margin-bottom: 1em;
}

.preview a {
  color: #A78BFA;
  text-decoration: none;
}

.preview a:hover {
  text-decoration: underline;
}

.preview img {
  max-width: 100%;
  border-radius: 8px;
  margin: 16px 0;
}

.preview code {
  background: #151820;
  padding: 2px 6px;
  border-radius: 4px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  color: #34D399;
}

.preview pre {
  background: #151820;
  padding: 16px;
  border-radius: 8px;
  overflow-x: auto;
  margin: 16px 0;
}

.preview pre code {
  background: none;
  padding: 0;
}

.preview blockquote {
  border-left: 3px solid #A78BFA;
  padding-left: 16px;
  color: #7A7D85;
  margin: 16px 0;
}

.preview ul, .preview ol {
  padding-left: 24px;
  margin-bottom: 1em;
}

.preview li {
  margin-bottom: 0.5em;
}

.preview table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
}

.preview th, .preview td {
  border: 1px solid #2A2D35;
  padding: 8px 12px;
  text-align: left;
}

.preview th {
  background: #151820;
  font-weight: 600;
}

/* Markdown raw */
.markdown {
  padding: 24px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  line-height: 1.6;
  color: #E8E6E1;
  white-space: pre-wrap;
  word-break: break-word;
  overflow-x: auto;
  max-height: 600px;
  overflow-y: auto;
  margin: 0;
}

/* JSON */
.json {
  padding: 24px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  line-height: 1.6;
  color: #E8E6E1;
  white-space: pre-wrap;
  word-break: break-all;
  overflow-x: auto;
  max-height: 600px;
  overflow-y: auto;
  margin: 0;
}

/* Error */
.error-area {
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.3);
  border-radius: 8px;
  padding: 12px 16px;
  color: #EF4444;
  font-size: 14px;
}

/* Utilities */
.hidden {
  display: none;
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: #151820;
}

::-webkit-scrollbar-thumb {
  background: #2A2D35;
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: #3A3D45;
}